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Liu Z, Navik R, Tan H, Xiang Q, Wahyudiono, Goto M, Ibarra RM, Zhao Y. Graphene-based materials prepared by supercritical fluid technology and its application in energy storage. J Supercrit Fluids 2022. [DOI: 10.1016/j.supflu.2022.105672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abdu HI, Hamouda HA, Orege JI, Ibrahim MH, Ramadan A, Aboudou T, Zhang H, Pei J. Carboxylated graphene oxide nanosheets as efficient electrodes for high-performance supercapacitors. Front Chem 2022; 10:944793. [PMID: 36105311 PMCID: PMC9465847 DOI: 10.3389/fchem.2022.944793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Accepted: 07/25/2022] [Indexed: 11/13/2022] Open
Abstract
In the presence of dry ice, a series of graphitic materials with carboxylated edges (ECGs) were synthesized by ball milling graphite for varied times (24, 36, and 46 h). The influence of carboxylation on the physiochemical characteristics and electrochemical performance as effective electrodes for supercapacitors were assessed and compared with pure graphite. Several characterization techniques were employed to investigate into the morphology, texture, microstructure, and modification of the materials. Due to its interconnected micro-mesoporous carbon network, which is vital for fast charge-discharge at high current densities, storing static charges, facilitating electrolyte transport and diffusion, and having excellent rate performance, the ECG-46 electrode among the investigated samples achieved the highest specific capacitance of 223 F g-1 at 0.25 A g-1 current density and an outstanding cycle stability, with capacitance retention of 90.8% for up to 10,000 cycles. Furthermore, the symmetric supercapacitor device based on the ECG-46 showed a high energy density of 19.20 W h kg-1 at 450.00 W kg-1 power density. With these unique features, ball milling of graphitic material in dry ice represents a promising approach to realize porous graphitic material with oxygen functionalities as active electrodes.
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Affiliation(s)
- Hassan Idris Abdu
- Qinba State Key Laboratory of Biological Resources and Ecological Environment, 2011 QinLing-Bashan Mountains Bioresources Comprehensive Development C. I. C, Shaanxi Province Key Laboratory of Bio-resources, College of Bioscience and Bioengineering, Shaanxi University of Technology, Hanzhong, China
| | - Hamouda Adam Hamouda
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, China
- Department of Chemistry, Faculty of Science, University of Kordofan, El Obeid, Sudan
| | - Joshua Iseoluwa Orege
- Ekiti State University, Ado-Ekiti, Nigeria
- University of Chinese Academy of Sciences, Beijing, China
| | | | - Anas Ramadan
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, China
| | - Taslim Aboudou
- The First Hospital of Lanzhou University, Lanzhou University, Lanzhou, China
| | - Hongxia Zhang
- Qinba State Key Laboratory of Biological Resources and Ecological Environment, 2011 QinLing-Bashan Mountains Bioresources Comprehensive Development C. I. C, Shaanxi Province Key Laboratory of Bio-resources, College of Bioscience and Bioengineering, Shaanxi University of Technology, Hanzhong, China
| | - Jinjin Pei
- Qinba State Key Laboratory of Biological Resources and Ecological Environment, 2011 QinLing-Bashan Mountains Bioresources Comprehensive Development C. I. C, Shaanxi Province Key Laboratory of Bio-resources, College of Bioscience and Bioengineering, Shaanxi University of Technology, Hanzhong, China
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